In the flick of a designer jacket he was gone. With the Munich police powerless to stop him, David Haye emerged from his London bolt hole, evaded the waiting cameramen in a high-speed flit around the M25 to Heathrow and flew out of London to have some "party time" in Las Vegas.

Had he taken such superb evasive action against Dereck Chisora in the highly charged atmosphere of the press conference room at the Olympiahalle in the early hours of Sunday morning, he would have had no need for subterfuge.

There was nothing, however, that anyone could do to prevent him ignoring repeated demands by Munich police to give his side of the ugly brawl with Chisora, even though he could go to prison if convicted of assault, as could Chisora for threatening behaviour.

Munich police said last night it could take a further two weeks to bring Haye back to Germany but, as they have not charged him, he is free to go where he pleases. They have asked Scotland Yard for help.

They stopped Chisora at Munich airport on Sunday morning and released him after seven hours. But Haye had already fled the scene of the incident, booked out of his hotel – fearful, he says, that Chisora would deliver on his threat to shoot him – and flew to London, where he went to ground.

"We're going to ask the British to help us but this is not a quick process," a Munich police spokesman said last night. "We have to go through the right channels, send letters, etc. We don't expect something to happen for around two weeks. It is not a serious charge, like murder; it is just a case involving two famous people."

Haye's trainer and manager, Adam Booth – who suffered a cut to his head when the former world champion swung a tripod wildly during the melee – said they have no plans to fight Chisora, even though it would generate enormous interest and revenue.

Suspicions that the brawl was premeditated, as a stunt to generate publicity, are wide of the mark. Haye gate-crashed the press conference to confront Vitali Klitschko, not Chisora.

"David is still retired," Booth said. "He has no plans to fight again. He's always said the only people he would come out [of retirement] to fight is one of the Klitschko brothers and what happened on Saturday night doesn't change that one bit."

Vitali Klitschko, who retained his WBC title with a hard-fought points win over Chisora, says he would happily fight him again, as he wanted to "knock him out". He said he would accommodate Haye as well, although his manager, Bernd Boente, who has a frosty relationship with Booth, is not keen on either of the brothers fighting Haye.

At the moment it is academic. Wladimir defends his three world titles against Jean-Marc Mormeck on 3 March. Vitali has torn muscles in his left shoulder and will be out for eight weeks. Chisora is due to go before a disciplinary panel of the British Boxing Board of Control on 14 March and could be banned for a long time. And Haye? He is probably lying in the sun with something long and cool.